<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
</head>
<body>
    <!-- 
        v-model收集单选框数据
            因为一组单选框只可能选中一个的value的值，所以直接使用字符串格式收集

     -->
    <div id="app">
        <h2>请选择你喜欢的城市</h2>
        <input type="radio" value="北京" v-model="likeCity" />北京
        <input type="radio" value="纽约" v-model="likeCity" />纽约
        <input type="radio" value="迪拜" v-model="likeCity" />迪拜
        <input type="radio" value="阿根廷" v-model="likeCity" />阿根廷
    </div>
    <script>
        Vue.config.productionTip = false;
        const vm = new Vue({
        el: "#app",
        data() {
          return {
            likeCity: " ",
          };
        },
      });
    </script>
</body>
</html>